try oldmercs.com you should be able to find a manual there
1983.
A 25 hp Mercury outboard, serial number 6370735, would be a 1983 year model.
An 80 hp Mercury outboard, serial number 6304884 is a 1983 year model.
An 80 hp Mercury outboard, serial number 6288030 is a 1983 year model.
the age is 1983 mercury buddy.
An 80 hp Mercury outboard, serial number 7206568 would be a 1983 year model.
The dry weight of a 1983 model, 40hp Mercury outboard, is 156lbs.
One manual has the number 6263906 listed as a 1983 model
The dry weight for an 1983 model, 80 hp Mercury outboard, is listed as 265 lbs.
The best solution is the find a service manual for that motor. I have seen these in libraries and they are for sale on the internet.
An 50 hp Mercury outboard, serial number 6276691, is a 1983 year model.
An 40 hp Mercury outboard, serial number 7197998 would be a 1983 year model.